Re: cdebconf-slang-udeb for use in cdrom 2.88 MiB floppy?

[Anton Zinoviev <anton@lml.bas.bg>]

On 29.I.2003 at 09:32 Martin Sjцgren wrote:
> 
> Right now, any time main-menu exits it's because of a bug in main-menu.
> It's written with an infinite loop that's basically aborted by reboot.
> If we want to be able to change frontend from the main menu, we have to
> figure out a way for a package to tell the main menu to exit. Ick.

There is no need to exit from the main-menu if cdebconf is started
from inside the main-menu.

Initialy in the initrd there is only one frontend installed.  Latter
several udebs have got retrieved and unpacked.  Amongst them can be
more frontends.

I suppose there can be some udeb providing /bin/frontend-chooser.
This script is invoked by the udeb which caused new frontend to be
unpacked and configured (i.e. by udeb that depends on particular
frontend).

The script /bin/frontend-chooser can be similar to this:

MAX_PRIORITY=-1
# FIXME: What should be used as unpacked-and-configured-frontends?
for frontend in `unpacked-and-configured-frontends` ; do
  INSTALLED_FRONTENDS="${INSTALLED_FRONTENDS} ${frontend}"
  db_get ${frontend}/description
  CHOICE="$RET"
  FRONTEND_CHOICES="${FRONTEND_CHOICES}, ${CHOICE}"
  db_get ${frontend}/priority
  PRIORITY="$RET"
  if [ "$MAX_PRIORITY" -lt "$PRIORITY" ] ; then
    MAX_PRIORITY="$PRIORITY"
    BEST_CHOICE="$CHOICE"
  fi
done

db_metaget shared/default-debconf-frontend choices
OLD_FRONTEND_CHOICES="$RET"

if [ "${OLD_FRONTEND_CHOICES}" != "${FRONTEND_CHOICES}" ]; then
  db_subst shared/default-debconf-frontend choices $FRONTEND_CHOICES
  db_subst shared/default-debconf-frontend default $BEST_CHOICE
  db_fset shared/default-debconf-frontend seen false
fi

db_input low shared/default-debconf-frontend || true
db_go

db_get shared/default-debconf-frontend
CURRENT_DEFAULT="$RET"

for frontend in $INSTALLED_FRONTENDS ; do
  db_get ${frontend}/description
  if [ "$RET" = "$CURRENT_DEFAULT" ]; then
    db_set debconf/frontend $frontend
    break
  fi
done


Anton Zinoviev